Specifications

6.11 CORONA CURRENT ADJUSTMENT
NOTE: The corona current varies with environmental conditions such as
humidity and atmospheric pressure. The corona current is adjusted
at the factory and is suitable under a wide range of environmental
conditions. Corona current adjustment is necessary whenever the
power packs are replaced; adjustment may also be necessary to
correct problems with paper separation, toner transfer, or image
density.
CAUTION: – Make sure that SP mode #9 is cleared before you change the
range on the digital multimeter. If not, the multimeter may be
damaged.
– High voltage is applied to the corona wires. Be careful.
- Preparation -
1. Turn off the main switch and remove the following parts:
• Development Unit
• Cleaning Unit
• Charge Corona Unit
• TC/SC Corona Unit
• Drum Unit
2. Clean or replace each corona wire and clean the corona units with water
or alcohol.
3. Remove the rear cover (4 screws).
4. Disconnect CN123 on the main board.
1 December 1990
5-72